Exercise block



FIG. 1 shows a perspective view of an exercise block showing my new design.

FIG. 2 shows a left side view thereof.

FIG. 3 shows a right side view thereof.

FIG. 4 shows a front elevation view thereof.

FIG. 5 shows a rear elevation view thereof.

FIG. 6 shows a top plan view thereof; and,

FIG. 7 shows a bottom plan view thereof. 

CLAIM The ornamental design for an exercise block, as shown and described. 